<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>实验2_10</title>
		<style>
			div{
				width: 100px;
				height: 100px;
				border: 1px solid red;
			}
			.box{
				position: relative;
				left: 50px;
				top: 50px;
			}
		</style>
	</head>
	<body>
		<div>1</div>
		<div>2</div>
		<div class="box">3</div>
		<div>4</div>
		<div>5</div>
	</body>
</html>
